I like to have a variety to choose from. Not only with sound profile, but also with IEM functionality and price.
Sure, it’s nice to have an amazing pair of all-BA IEMs for critical listening at home on the couch. I can drive them properly with a bulky DAP and headphone amplifier stack. And they can have a thick bulky braided cable that’s worn behind the ear, and I wouldn’t mind.
However, I went kayaking today and used my $2.65 KZ EDR1 and iPod Nano 6G in a ziplock baggie. If I got them wet or lost them in the river forever, I would not have cared in the least. Did they sound as good as my expensive ones? No, but they sure sounded good enough for their use.
Same with working out. I want something sweat proof, and preferably Bluetooth. Do I need “amazing sound”? Nope.
Likewise, when watching a movie I don’t want to screw with something I have to wear behind the ears, of deal with memory wires. I just pop in my $25 MEMT T5 earpods and it’s done. If I need to get up or answer a family member’s question, they are fast and easy to just pop in and out. I also need something that sounds good when driven from a basic laptop. My expensive pairs do not fit that bill.
What if I want to take a nap with music? I want something small that disappears in my ear. A giant bodied IEM like KZ ZSR won’t do. Something small like the $15 MEMT X5 works perfectly. It sounds plenty good enough for sleeping, and works well at low volume.
So with my lifestyle, it would honestly be a big PITA to only have “1 amazing pair” and that’s it.
Do my numerous <$30 pairs - EDR1, X5, T5, modded BlitzWolf ES1, ZS6, ZSR, etc - sound as good as CA Andromedas? Uh, no. But they sure sound much better than average. I would not enjoy nor tolerate them if they sounded like dollar store garbage. But luckily they don’t.